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The SAMI galaxy survey: Can we trust aperture corrections to predict star formation?

Richards, Samuel; Bryant, J J; Croom, S; Hopkins, Andrew M.; Schaefer, A L; Bland-Hawthorn, Jonathan; Allen, James T; Brough, Sarah; Cecil, Gerald; Cortese, L; Ho, I-Ting; Kewley, Lisa; Medling, Anne; Sharp, Robert; Green, Andrew W; Konstantopoulos, I S; Lawrence, J; Sweet, Sarah

Description

In the low-redshift Universe (z < 0.3), our view of galaxy evolution is primarily based on fibre optic spectroscopy surveys. Elaborate methods have been developed to address aperture effects when fixed aperture sizes only probe the inner regions for galaxies of ever decreasing redshift or increasing physical size. These aperture corrections rely on assumptions about the physical properties of galaxies. The adequacy of these aperture corrections can be tested with integral-field spectroscopic...[Show more]

dc.contributor.authorRichards, Samuel
dc.contributor.authorBryant, J J
dc.contributor.authorCroom, S
dc.contributor.authorHopkins, Andrew M.
dc.contributor.authorSchaefer, A L
dc.contributor.authorBland-Hawthorn, Jonathan
dc.contributor.authorAllen, James T
dc.contributor.authorBrough, Sarah
dc.contributor.authorCecil, Gerald
dc.contributor.authorCortese, L
dc.contributor.authorHo, I-Ting
dc.contributor.authorKewley, Lisa
dc.contributor.authorMedling, Anne
dc.contributor.authorSharp, Robert
dc.contributor.authorGreen, Andrew W
dc.contributor.authorKonstantopoulos, I S
dc.contributor.authorLawrence, J
dc.contributor.authorSweet, Sarah
dc.date.accessioned2018-11-29T22:53:35Z
dc.date.available2018-11-29T22:53:35Z
dc.identifier.issn0035-8711
dc.identifier.urihttp://hdl.handle.net/1885/152515
dc.description.abstractIn the low-redshift Universe (z < 0.3), our view of galaxy evolution is primarily based on fibre optic spectroscopy surveys. Elaborate methods have been developed to address aperture effects when fixed aperture sizes only probe the inner regions for galaxies of ever decreasing redshift or increasing physical size. These aperture corrections rely on assumptions about the physical properties of galaxies. The adequacy of these aperture corrections can be tested with integral-field spectroscopic data. We use integral-field spectra drawn from 1212 galaxies observed as part of the SAMI Galaxy Survey to investigate the validity of two aperture correction methods that attempt to estimate a galaxy's total instantaneous star formation rate. We show that biases arise when assuming that instantaneous star formation is traced by broad-band imaging, and when the aperture correction is built only from spectra of the nuclear region of galaxies. These biases may be significant depending on the selection criteria of a survey sample. Understanding the sensitivities of these aperture corrections is essential for correct handling of systematic errors in galaxy evolution studies.
dc.format.mimetypeapplication/pdf
dc.publisherBlackwell Publishing Ltd
dc.sourceMonthly Notices of the Royal Astronomical Society
dc.titleThe SAMI galaxy survey: Can we trust aperture corrections to predict star formation?
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume455
dc.date.issued2016
local.identifier.absfor020100 - ASTRONOMICAL AND SPACE SCIENCES
local.identifier.absfor020110 - Stellar Astronomy and Planetary Systems
local.identifier.ariespublicationU3488905xPUB11610
local.type.statusPublished Version
local.contributor.affiliationRichards, Samuel, University of Sydney
local.contributor.affiliationBryant, J J, Australian Astronomical Observatory
local.contributor.affiliationCroom, S, University of Sydney
local.contributor.affiliationHopkins, Andrew M., Australian Astronomical Observatory
local.contributor.affiliationSchaefer, A L, University of Sydney
local.contributor.affiliationBland-Hawthorn, Jonathan, University of Sydney
local.contributor.affiliationAllen, James T, University of Sydney
local.contributor.affiliationBrough, Sarah, Australian Astronomical Observatory
local.contributor.affiliationCecil, Gerald, University of North Carolina
local.contributor.affiliationCortese, L, Cortese
local.contributor.affiliationHo, I-Ting, College of Science, ANU
local.contributor.affiliationKewley, Lisa, College of Science, ANU
local.contributor.affiliationMedling, Anne, College of Science, ANU
local.contributor.affiliationSharp, Robert, College of Science, ANU
local.contributor.affiliationGreen, Andrew W, Australian Astronomical Observatory
local.contributor.affiliationKonstantopoulos, I S, Australian Astronomical Observatory
local.contributor.affiliationLawrence, J, Australian Astronomical Observatory
local.contributor.affiliationSweet, Sarah, College of Science, ANU
local.bibliographicCitation.issue3
local.bibliographicCitation.startpage2826
local.bibliographicCitation.lastpage2838
local.identifier.doi10.1093/mnras/stv2453
local.identifier.absseo970102 - Expanding Knowledge in the Physical Sciences
dc.date.updated2018-11-29T07:53:33Z
local.identifier.scopusID2-s2.0-84959123320
local.identifier.thomsonID000368008200043
dcterms.accessRightsOpen Access
CollectionsANU Research Publications

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